Question

What happen when the retina absorbs light?

Answer 1

Photosensitive cells convert the light energy into electro-chemical signals that are passed through the optic nerve to the brain for interpretation.

Explanation:

When light falls on the retina after being inverted by the lens, the incident light energy is converted by cells called rods and cones into electro-chemical signals.

Rods are useful for recognising low and monochromatic light while cones are useful for recognising bright light and colours.

These electro-chemical signals are then passed via the optic nerve to the brain which then interprets the signals to enable sight.